68 MPG combined. That’s the headline for the 2017 Honda Clarity FCV, a figure that needs immediate understanding. This is equivalent efficiency, and it applies to a vehicle powered by a hydrogen fuel cell. The Clarity FCV appeals to a specific buyer: one who prioritizes zero-emission driving, lives in a hydrogen refueling area (primarily California), and is willing to embrace the cutting edge of automotive technology, even with its inherent compromises.

City and highway performance

The EPA breaks down the Clarity FCV’s efficiency further, offering a look at its performance across different driving environments. It achieves 69 MPG in the city and 67 MPG on the highway. These seemingly small differences show the fuel cell’s characteristics. The city MPG being slightly higher suggests the regenerative braking system helps efficiency in stop-and-go traffic. Highway driving, requiring sustained power output, brings the efficiency down slightly. However, the consistency across both environments demonstrates a fuel cell powertrain that is optimized to deliver efficient power regardless of driving conditions, something of considerable benefit to the early adopters ready to commit to this technology.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Honda Clarity FCV at $772. This calculation is based on driving 15,000 miles per year, using national average fuel prices (or, in this case, the equivalent cost of hydrogen). This figure depends highly on the price of hydrogen in your area, which can fluctuate significantly and is often substantially higher than gasoline, directly impacting the cost savings despite the outstanding fuel economy. While $772 is the “official” number, reality may paint a different picture depending on how often you drive and where you fill up. The CLARITY MPG across all years, including other powertrains, can give you a better sense of Honda’s overall commitment to efficiency.

Real-world expectations

The Clarity FCV’s efficiency claims must be viewed within the context of its hydrogen fuel cell technology. While the EPA numbers are impressive, real-world range and refueling practicality are critical considerations. Range is limited to around 366 miles, which is adequate for daily commuting but requires planning for longer trips. Refueling is a bigger hurdle. Hydrogen stations are scarce, concentrated almost entirely in California, meaning this car is truly only viable within specific geographic areas. Furthermore, station availability varies and hydrogen supply is not always guaranteed. These variables mean that real-world efficiency, while theoretically excellent, is more about reliable access to fuel than getting every last mile out of each tank.

How it compares

Comparing the Clarity FCV directly to conventionally fueled vehicles isn’t entirely fair because of the fundamentally different technologies involved. However, against other alternative fuel vehicles, the picture becomes clearer. The Toyota Mirai, another hydrogen fuel cell vehicle, offers similar EPA ratings. Against electric vehicles, the Clarity FCV offers a different trade-off: slower refueling times measured in a few minutes , unlike the hours required for electric charging. Against hybrid vehicles such as the Honda Accord Hybrid with its 47 MPG combined, the Clarity FCV offers slightly higher efficiency but at the cost of very limited geographical usability and a far higher purchase price. But comparing to gasoline vehicles like the Honda Accord 1.5T’s 33 MPG combined highlights why someone buys a Clarity FCV: it isn’t about cost savings alone, but about emissions reduction.

Tips to maximize efficiency

Smooth and steady acceleration is key to maximizing efficiency in the Clarity FCV. While the electric motor provides instant torque, rapid acceleration drains the hydrogen tank more quickly. Gentle acceleration allows the fuel cell system to operate more efficiently.

Use the regenerative braking system effectively. Anticipate stops and ease off the accelerator early, allowing the motor to recapture energy and slow the vehicle. This can significantly improve city driving efficiency.

Minimize accessory usage, especially the air conditioning. Like electric vehicles, using climate control can draw significant power and reduce overall driving range. Pre-conditioning the cabin while plugged in (if possible) can help mitigate this.

Maintain proper tire inflation. Under-inflated tires increase rolling resistance, which decreases efficiency. Check your tire pressure regularly and keep them at the recommended level.

Plan your routes carefully to take advantage of available hydrogen refueling stations. Avoid unnecessary detours or driving in areas with limited refueling infrastructure. Staying close to reliable refueling options ensures you never run the tank close to empty and risk being stranded. Review all Honda fuel economy data to fully appreciate this vehicle’s mission.